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使用气态臭氧体外处理控制储存埃及带壳花生中黄曲霉和黄曲霉毒素B1的潜力(网络首发、推荐阅读)
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Potential for Control of A. Flavus and Aflatoxin B1 in Vitro and in Stored Egyptian Shelled Peanuts using Gaseous Ozone Treatment(Online First, Recommended Article)
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    研究考察在不同水分活度(aw, 0.89~0.97=13.1%~24%水分含量)和体外25 ℃条件下,气态臭氧(O3)对黄曲霉菌株(a)孢子萌发,(b)菌丝生长,(c)产黄曲霉毒素B1(AFB1)的影响。此外,以埃及花生为研究对象,在0.93 aw下,带壳花生接种两种浓度的黄曲霉分生孢子(103、105分生孢子/g)置于气态O3中然后储存。在所有情况下,臭氧处理设置为30 min,流速为6 L/min。通常,大于100 ppm浓度的O3 48 h内,可显著抑制黄曲霉菌株(EGP-B07;SRRC-G 1907)在特定酵母蔗糖培养基上的分生孢子萌发。然而,浓度高达300 ppm的O3,对黄曲霉的生长和菌落的扩展没有影响。相同浓度在0.89 aw时能显著影响AFB1的产生。0.93 aw条件下,储存带壳花生中的两种黄曲霉菌株在100~400 ppm O3的数量显著减少。然而,两接种量水平下,AFB1产量仅在 400 ppm O3处理中显著降低。对使用O3气体控制采后带壳花生中的黄曲霉种群和AFB1的结果进行了讨论。

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    The objective of this study was to examine the effect of gaseous ozone (O3) on (a) germination, (b) mycelial growth, (c) aflatoxin B1 (AFB1) production by strains of Aspergillus flavus at different water activity (aw, 0.89~0.97=13.1%~24% moisture content) and 25 ℃ in vitro. In addition, taking Egyptian peanuts as a research object, shelled peanuts at 0.93 aw were inoculated with two concentrations of A. flavus conidia (103, 105 conidia/g) and exposed to gaseous O3 and then stored. In all cases, exposure was for 30 min at 6 L/min. Generally, >100 ppm O3 significantly inhibited conidial germination of A. flavus strains (EGP-B07; SRRC-G 1907) on a defined yeast sucrose medium within 48 hrs. However, exposure of growing colonies of A. flavus to O3 with up to 300 ppm, had no effect on subsequent colony extension. The same concentration significantly affected AFB1 production, but only at 0.89 aw. Populations of both A. flavus strains in stored shelled peanuts exposed at 0.93 aw were significantly decreased at 100~400 ppm O3. However, AFB1 production was only significantly reduced in the 400 ppm O3 treatments at both inoculum load levels. These results are discussed in the context of O3 gas use for controlling A. flavus populations and AFB1 in shelled peanuts post-harvest.

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Yousef Sultan, Naresh Magan*.使用气态臭氧体外处理控制储存埃及带壳花生中黄曲霉和黄曲霉毒素B1的潜力(网络首发、推荐阅读)[J].粮油食品科技,2021,29(6):29-37.

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  • 在线发布日期: 2021-12-06
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